Mist Dancer comes back from the grave with a vengeance, granting all your flying Merfolk an extra three power for the turn, and perhaps letting you close out the game
MAR cards show up in a dedicated slot in Collector boosters, and you're 100% guaranteed to get one in each booster in that sense, they are more common than proper mythics from the main set
Remember, when building a deck, you cant just look at the ceiling of a card, but the floor too
Accessories Protect your collection from wear and tear with card sleeves, deck boxes, and playmats
As a glorified Merfolk Looter, this once nearly-$100 card saw extensive Constructed play, but looting only gets you so far in Commander where you have more options for pure card advantage
You really need to get through Tomb of Annihilation for the Archlich to be useful, but it can be a real problem for your opponents once you do